System and methods for reducing air pressure in a cabin of a vehicle to assist in door closure

ABSTRACT

System, methods, and other embodiments described herein relate to assisting in closing a door of a vehicle by leveraging a Heating, Ventilation and Air-conditioning (HVAC) system in the vehicle. In one embodiment, a method includes detecting a position of at least one vehicle door, and when the position of the at least one vehicle door is an open position, determining whether to activate the HVAC system to reduce air pressure in a cabin of the vehicle. The method includes, in response to determining to activate the HVAC system, pumping air out of the cabin such that at least some of any increased air pressure caused by a vehicle door closure is removed from the cabin. The method includes, when the position of the at least one vehicle door has changed from the open position to a closed position, deactivating the HVAC system to stop pumping air out from the cabin.

TECHNICAL FIELD

The subject matter described herein relates, in general, to a system and method for reducing air pressure in a cabin of a vehicle to assist in closing a door of the vehicle.

BACKGROUND

Closing a door of a vehicle may lead to an increase in air pressure in a cabin of the vehicle, and the increase in air pressure in the cabin may exert a counterforce on the door as the door closes. Reducing the air pressure in the cabin reduces a force for closing the door, which can alleviate the amount of energy a user has to apply to close the door. Further, reducing the energy exerted by the user may, for example, reduce wear and tear on the door, a door opening receiving the door, and an opening/closing mechanism that moves the door from an open position to a closed position.

SUMMARY

In one embodiment, example systems and methods relate to a manner of assisting a user in closing a vehicle door. As noted above, a user may experience difficulty closing the vehicle door due to an increase in air pressure in a cabin of the vehicle as the user closes the vehicle door.

In one embodiment, a method for assisting in closing a door of a vehicle is disclosed. The method includes detecting a position of at least one vehicle door and when the position of the at least one vehicle door is an open position, determining whether to activate a Heating, Ventilation and Air-conditioning (HVAC) system to reduce air pressure in a cabin of the vehicle. The method includes, in response to determining to activate the HVAC system, pumping air out of the cabin such that at least some of any increased air pressure caused by a vehicle door closure is removed from the cabin. The method also includes, when the position of the at least one vehicle door has changed from the open position to a closed position, deactivating the HVAC system to stop pumping air out from the cabin.

In another embodiment, a cabin pressure-relief system for assisting in closing a door of a vehicle is disclosed. The cabin pressure-relief system includes one or more sensors operable to detect a position of at least one vehicle door, a Heating, Ventilation and Air-conditioning (HVAC) system, one or more processors, and a memory communicably coupled to the one or more processors. The memory stores an air pressure control module including instructions that when executed by the one or more processors cause the one or more processors to, when the position of the at least one vehicle door is in an open position, determine whether to activate the HVAC system to reduce air pressure in a cabin of the vehicle. In response to determining to activate the HVAC system, the HVAC system pumps air out of the cabin such that at least some of any increased air pressure caused by a vehicle door closure is removed from the cabin. The memory stores an HVAC control module including instructions that when executed by the one or more processors cause the one or more processors to, when the position of the at least one vehicle door has changed from the open position to a closed position, deactivate the HVAC system to stop pumping air out from the cabin.

In another embodiment, a non-transitory computer-readable medium for assisting in closing a door of a vehicle and including instructions that when executed by one or more processors cause the one or more processors to perform one or more functions, is disclosed. The instructions include instructions to receive a position of at least one vehicle door. The instructions further include instructions to, when the position of the at least one vehicle door is an open position, determine whether to activate a Heating, Ventilation and Air-conditioning (HVAC) system to reduce air pressure in a cabin of the vehicle, and when the position of the at least one vehicle door has changed from the open position to a closed position, deactivate the HVAC system to stop pumping air out from the cabin.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate various systems, methods, and other embodiments of the disclosure. It will be appreciated that the illustrated element boundaries (e.g., boxes, groups of boxes, or other shapes) in the figures represent one embodiment of the boundaries. In some embodiments, one element may be designed as multiple elements or multiple elements may be designed as one element. In some embodiments, an element shown as an internal component of another element may be implemented as an external component and vice versa. Furthermore, elements may not be drawn to scale.

FIG. 1 illustrates one embodiment of a vehicle within which systems and methods disclosed herein may be implemented.

FIG. 2 illustrates one embodiment of a vehicle cabin pressure-relief system that is associated with reducing air pressure in a cabin of the vehicle.

FIG. 3 illustrates one embodiment of a process associated with reducing air pressure in the cabin in response to detecting a door of the vehicle closing.

DETAILED DESCRIPTION

Systems, methods, and other embodiments associated with reducing air pressure in a cabin of a vehicle when a door of the vehicle is closing are disclosed. As noted, closing the door may lead to a buildup of air pressure in the cabin, which can, in some instances, exert a counterforce on the door, making a user apply more force to close the door.

To prevent an increase in air pressure and reduce the counterforce, some current vehicles may have pressure relief valves, which open and vent air from the cabin when the air pressure in the cabin increases as the door closes. However, such pressure relief valves may not vent the air fast enough for the sudden increase in air pressure caused by the door as the door closes. In the case where the pressure relief valves are large enough to vent the air fast enough, the valves may permit unwanted external noises into the cabin.

Accordingly, in one embodiment, the disclosed approach exploits a heating, ventilation, and air-conditioning (HVAC) system to reduce the air pressure in the cabin by utilizing the HVAC system to pump air out of the cabin. Specifically, the HVAC system pumps air out of the cabin when a door is determined to be closing.

The HVAC system may pump air out of the cabin at a faster rate than air being exhausted through the pressure relief valves, and as such, the disclosed approach has a quicker response time when a door is determined to be closing. Further, the HVAC system may pump more air out of the cabin than air in the cabin being displaced by the door closing. Thus, with a lower air pressure in the cabin, the disclosed approach may suck the door in as the door closes, which may alleviate some of the force to be exerted by the user. In contrast, the prior art may not provide significant relief to the user closing the door, as the pressure relief valves may only exhaust air displaced by the door closing.

A cabin pressure-relief system may include an HVAC control module, which activates and deactivates the HVAC system and can adjust an HVAC system rate of pumping air out of the cabin. The HVAC system rate may be raised to exert more force (e.g., a stronger pull) on the door, and conversely, the HVAC system rate may be lowered to exert less force (e.g., a weaker pull) on the door.

In one approach, a cabin pressure-relief system detects a position of at least one door of the vehicle by receiving sensor data from sensors such as cameras, door position sensors, etc. The sensor data can include information such as the position of the door (e.g., whether the door is in a closed position or in an open position). When the door is in the open position, the cabin pressure-relief system may determine whether to activate the HVAC system based on a number of factors such as the open/closed status of other doors in the vehicles, the open/closed status of the windows in a vehicle, etc. If the HVAC system is activated, air is pumped out of the cabin, reducing the air pressure in the cabin, which may reduce the amount of force a user has to apply to close the door. When the door moves from the open position to the closed position, the cabin pressure-relief system may deactivate the HVAC system and prevent further air from being pumped out of the cabin.

Referring to FIG. 1, an example of a vehicle 100 is illustrated. As used herein, a “vehicle” is any form of motorized transport. In one or more implementations, the vehicle 100 is an automobile. While arrangements will be described herein with respect to automobiles, it will be understood that embodiments are not limited to automobiles. In some implementations, the vehicle 100 may be any robotic device or form of motorized transport that has one or more doors, where the doors in the closed position, enclose the cabin of the vehicle and separate the cabin from a surrounding environment of the vehicle and thus benefits from the functionality discussed herein.

The vehicle 100 includes an HVAC system 110, a sensor system 120, and a cabin pressure-relief system 146. The vehicle 100 also includes various elements. It will be understood that in various embodiments it may not be necessary for the vehicle 100 to have all of the elements shown in FIG. 1. The vehicle 100 can have any combination of the various elements shown in FIG. 1. Further, the vehicle 100 can have additional elements to those shown in FIG. 1. In some arrangements, the vehicle 100 may be implemented without one or more of the elements shown in FIG. 1. While the various elements are shown as being located within the vehicle 100 in FIG. 1, it will be understood that one or more of these elements can be located external to the vehicle 100. Further, the elements shown may be physically separated by large distances.

The HVAC system 110 can be configured to change the environment or climate of the cabin 152 of the vehicle 100. Some of the possible elements of the HVAC system 110 are shown in FIG. 1 and will be described. It will be understood that it is not necessary for the HVAC system 110 to have all of the elements shown in FIG. 1 or described herein. The HVAC system 110 can have any combination of the various elements shown in FIG. 1. Further, the HVAC system 110 can have additional elements to those shown in FIG. 1.

The HVAC system 110 can include an air conditioning (AC) system 119. The AC system 119 can have any configuration to allow for cooling and/or humidity control for at least a portion of the vehicle 100. In one or more arrangements, the AC system 119 can include various elements that can be arranged in any suitable manner and/or can be operatively connected to each other in any suitable manner.

The HVAC system 110 can include one or more power sources 112 to provide mechanical or electrical power to one or more elements of the HVAC system 110. In one or more arrangements, the power source(s) 112 can include the battery 104. Alternatively or in addition, the power source(s) 112 can include other power sources. For example, the power source(s) 112 can include additional batteries and/or generators.

The HVAC system 110 can include one or more blowers 116 to direct and/or cause the movement of air or other fluid/gas. The one or more blowers 116 fluidly connect the HVAC system 110 and the cabin 152. As used herein, “air” can include any gaseous fluid. For example, air can include environmental gas in and/or around the vehicle 100. The blower(s) 116 can be configured to direct and/or cause the movement of air from inside the cabin 152 to the external environment 154 as well as from the external environment 154 into the cabin 152.

In one or more arrangements, the blower(s) 116 can include a blower motor and one or more fans to move a quantity of air from inside the cabin 152, through air ducts which fluidly connect the cabin 152 to the external environment 154. In one or more arrangements, the blower(s) 116 can be powered by the powertrain 102, the battery 104, and/or the power source(s) 112.

The HVAC system 110 can include one or more intake mode switches 118 to control the source of air being introduced to the HVAC system 110 and/or the vehicle 100. In one or more arrangements, the intake mode switch(es) 118 can be configured to allow the selection of a source of air being introduced to the blower(s) 116. For instance, the source of air can be outside of the cabin 152 and/or from an external environment 154, referred to as “fresh mode air source”. Additionally, the source of air can be within the cabin 152, referred to as “recirculation mode air source.” In one or more arrangements, the intake mode switch(es) 118 can be operated to change the air source selection between a fresh mode air source, a recirculation mode air source, and/or a mix of both modes.

In the fresh air mode, the cabin 152 is fluidly connected to the external environment 154. As such, in addition to allowing air from outside of the cabin 152 and/or from an external environment 154 to be introduced to the blower(s) 116, the intake mode switch(es) 118 can allow the blower(s) 116 to pump (or suck) air from the cabin 152 out and to the external environment 154. In other words, when the cabin 152 is fluidly connected to the external environment 154, the blower(s) 116 can pump air out of the cabin 152 and exhaust the pumped air to the external environment 154.

The HVAC system 110 can include one or more HVAC controllers 114. “Controller” means any component or group of components that are configured to execute any of the processes described herein or any form of instructions to carry out such processes or cause such processes to be performed. Specifically, the HVAC controllers 114 may be configured to execute the instructions in the HVAC control module 230. The HVAC controller(s) 114 may be implemented with one or more general-purpose and/or one or more special-purpose processors. Examples of suitable HVAC controller(s) 114 include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Further examples of suitable processors include, but are not limited to, a central processing unit (CPU), an array processor, a vector processor, a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic array (PLA), an application specific integrated circuit (ASIC), programmable logic circuitry, and a processor. The HVAC controller(s) 114 can include at least one hardware circuit (e.g., an integrated circuit) configured to carry out instructions contained in program code. In arrangements in which there is a plurality of HVAC controllers 114, such HVAC controllers 114 can work independently from each other or one or more HVAC controllers 114 can work in combination with each other.

The HVAC controller 114 can be configured to cause, directly or indirectly, one or more elements of the HVAC system 110 to be activated or deactivated. As used herein, “cause” or “causing” means to make, force, compel, direct, command, instruct, and/or enable an event or action to occur or at least be in a state where such event or action may occur, either in a direct or indirect manner. In one or more arrangements, the HVAC controller 114 can be an HVAC electronic control unit (ECU).

The sensor system 120 may include one or more sensors 122, 124, 126, 128, 130, 132. “Sensor” means any device, component and/or system that can detect, determine, assess, monitor, measure, quantify and/or sense something. The one or more sensors 122, 124, 126, 128, 130, 132 can be configured to detect, determine, assess, monitor, measure, quantify and/or sense in real-time. As used herein, the term “real-time” means a level of processing responsiveness that a user or system senses as sufficiently immediate for a particular process or determination to be made, or that enables the processor to keep up with some external process.

In arrangements in which there are a plurality of sensors, the sensors 122, 124, 126, 128, 130, 132 can work independently from each other. Alternatively, two or more of the sensors 122, 124, 126, 128, 130, 132 can work in combination with each other. In such case, the two or more sensors 122, 124, 126, 128, 130, 132 can form a sensor network. The sensors 122, 124, 126, 128, 130, 132 can be operatively connected to the cabin pressure-relief system 146, the HVAC control module 230, and/or other element of the vehicle 100 (including any of the elements shown in FIG. 1). The sensors 122, 124, 126, 128, 130, 132 can include any suitable type of sensor. Various examples of different types of sensors will be described herein. However, it will be understood that the embodiments are not limited to the particular sensors described.

The sensor system 120 can include one or more door position sensors 132. The door position sensor 132 can be configured to sense a position of the door 148, for example, an open door position or a closed position. The door position sensor 132 can be any suitable sensor. As an example, in a case where the door 148 is connected by a hinge 156 to a door opening 150 receiving the door 148, the door position sensor 132 may include one or more touch-sensitive buttons located along the hinge 156. The one or more touch-sensitive buttons may be spaced along the hinge 156 such that as the door 148 opens or closes, a different touch-sensitive button is making contact with an edge of the door opening 150, generally indicating an angle at which the door 148 is open. The one or more touch-sensitive buttons may be communicatively connected to the air pressure control module 220, the HVAC control module 230 and/or any other control units.

The sensor system 120 can include one or more door handle touch sensors (not numbered). The door handle touch sensor can be configured to detect when a door handle 158 has been touched and/or moved (e.g. where the user lifts or pulls on the vehicle door handle 158). In one or more arrangements, the one or more door handle touch sensors may be capacitive touch sensors or resistant touch sensors.

The sensor system 120 can include one or more radar sensors, one or more LIDAR sensors, one or more sonar sensors, one or more proximity sensors and/or one or more cameras 130. The sensors may acquire sensor data 142 in various forms such as still images, video, point clouds, and so on. As an example, the camera 130 may acquire a video of a surrounding environment 154 of the vehicle 100, which may include the position of the door 148. As another example, the video 142 may include images of any users proximate to the vehicle 100. In one or more arrangements, the one or more cameras 130 can be high dynamic range (HDR) cameras or infrared (IR) cameras.

The sensor system 120 can include one or more ambient temperature sensors 122. The ambient temperature sensor(s) 122 can be configured to sense an ambient temperature outside of the vehicle 100. As used herein, “ambient temperature” includes the air temperature of at least a portion of the surrounding environment 154 of the vehicle 100. For instance, the ambient temperature can be the air temperature near an exterior portion of the vehicle 100. The ambient temperature sensor(s) 122 can be any suitable sensor, including mechanical, electrical, and/or integrated circuit temperature sensors that can detect, determine, assess, monitor, measure, quantify, and/or sense an ambient temperature. For example, the ambient temperature sensor(s) 122 can include a mechanical thermometer, a bimetal sensor, a thermistor, a thermocouple, a resistance thermometer, and/or a silicon bandgap sensor. In one or more arrangements, the ambient temperature sensor(s) 122 can be at least partially located at, on, or proximate to an exterior surface of the vehicle 100. In some arrangements, the ambient temperature sensor(s) 122 can be separate from the vehicle 100. For instance, the vehicle 100 can receive signals from an exterior ambient temperature sensor 122. In some examples, the vehicle 100 can receive ambient temperature information from a weather service, a remote server, or application software.

The sensor system 120 can include one or more internal temperature sensors 124 to detect, determine, assess, monitor, measure, quantify, and/or sense an internal temperature of the vehicle 100. “Internal temperature” means an air temperature of at least a portion of the cabin 152. The internal temperature sensor(s) 124 can be any suitable sensor, including mechanical, electrical, and/or integrated circuit temperature sensors. For example, the internal temperature sensor(s) 124 can include a mechanical thermometer, a bimetal sensor, a thermistor, a thermocouple, a resistance thermometer, and/or a silicon bandgap sensor.

The sensor system 120 can include one or more internal and/or external air pressure sensors 126, 128. The internal air pressure sensor(s) 126 can be configured to detect, determine, assess, monitor, measure, quantify, and/or sense an internal air pressure of the vehicle 100. “Internal air pressure” means an air pressure of at least a portion of the cabin 152. The external air pressure sensor(s) 128 can be configured to detect, determine, assess, monitor, measure, quantify, and/or sense an external ambient air pressure of the vehicle 100. As used herein, “external ambient air pressure” includes the air pressure of at least a portion of the surrounding external environment 154 of the vehicle 100. For instance, the external air pressure can be air pressure near an exterior portion of the vehicle 100. The air pressure sensor(s) 126, 128 can be any suitable sensor, including mechanical, electrical, and/or integrated circuit air pressure sensors. As an example, the air pressure sensor(s) 126, 128 can include a magnahelic gauge, which may be configured to sense both the internal air pressure and the external ambient air pressure, and determine the difference between the internal air pressure and the external ambient air pressure.

Some of the possible elements of the vehicle 100 are shown in FIG. 1 and will be described along with subsequent figures. However, a description of many of the elements in FIG. 1 will be provided after the discussion of FIGS. 2-3 for purposes of brevity of this description. Additionally, it will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, the discussion outlines numerous specific details to provide a thorough understanding of the embodiments described herein. Those of skill in the art, however, will understand that the embodiments described herein may be practiced using various combinations of these elements.

In either case, the vehicle 100 includes a cabin pressure-relief system 146 that is implemented to perform methods and individual functions as disclosed herein relating to reducing the air pressure in a cabin 152 of the vehicle 100. The noted functions and methods will become more apparent with a further discussion of the figures.

With reference to FIG. 2, one embodiment of the cabin pressure-relief system 146 of FIG. 1 is further illustrated. The cabin pressure-relief system 146 is shown as including a processor 138 from the vehicle 100 of FIG. 1. Accordingly, the processor 138 may be a part of the cabin pressure-relief system 146, the cabin pressure-relief system 146 may include a separate processor from the processor 138 of the vehicle 100, or the cabin pressure-relief system 146 may access the processor 138 through a data bus or another communication path. In either case, it is generally understood that the processor 138 is a microprocessor or other electronic processing device that is configured with computing resources capable of performing the functions (e.g., executing machine learning algorithms) disclosed herein.

In one embodiment, the cabin pressure-relief system 146 includes a memory 210 that stores an air pressure control module 220 and an HVAC control module 230. The memory 210 is a random-access memory (RAM), read-only memory (ROM), a hard disk drive, a flash memory, or other suitable memory for storing the air pressure control module 220 and the HVAC control module 230. The air pressure control module 220 and the HVAC control module 230 are, for example, computer-readable instructions that when executed by the processor 138 cause the processor 138 to perform the various functions disclosed herein.

In one embodiment, the air pressure control module 220 generally includes instructions that function to control the air pressure within the cabin 152 by determining when to activate the HVAC system 110 to pump air out of the cabin 152, and when to deactivate the HVAC system 110 from pumping air out of the cabin 152. In another embodiment, in addition to instructions that function to determine whether to activate the HVAC system 110 to pump air out, the air pressure control module 220 may further include instructions to control the air pressure within the cabin 152 by determining when to activate the HVAC system 110 to pump air into the cabin 152 and when to deactivate the HVAC system 110 from pumping air into the cabin 152.

The air pressure control module 220 may include instructions that function to control the processor 138 to determine an HVAC system rate of pumping air into or out of the cabin 152 based on various factors such as a weight of the door 148. In the case where the door 148 is heavier, the air pressure control module 220 may determine more force is required to close the door 148 and may set the HVAC system rate to a higher value such that more air is pumped out in a shorter period, which may facilitate closing the door 148. In the case where the door 148 is lighter, the air pressure control module 220 may determine less force is required to close the door 148 and may set the HVAC system rate to a lower value.

Further, the air pressure control module 220 generally includes instructions that function to control the processor 138 to receive sensor data 142 from a sensor system 120 of the vehicle 100. The present discussion will focus on collection of sensor data 142 from a door position sensor 132, a camera 130, and pressure sensors 126, 128; however, it should be appreciated that the disclosed approach can be extended to cover further configurations of sensors such as LiDAR sensors, multiple cameras covering a three-hundred and sixty-degree view around the vehicle 100, combinations of different types of cameras, proximity sensors, and so on. Accordingly, the air pressure control module 220, in one embodiment, may control the respective sensors 120 to provide the data inputs in any suitable form to the processor 138.

As an additional note, while the air pressure control module 220 is discussed as controlling the various sensors 120 to provide the sensor data 142, in one or more embodiments, the air pressure control module 220 can employ other techniques to acquire the sensor data 142 that are either active or passive. For example, the air pressure control module 220 may passively sniff the data inputs from a stream of electronic information provided by the various sensors 120 to further components within the vehicle 100.

In general, as provided for herein, the air pressure control module 220 receives the sensor data 142 from the respective sensors 120 and then may determine based on the sensor data 142, whether to transmit an activation signal or a deactivation signal to the HVAC control module 230 to activate the HVAC system 110 to pump air out of the cabin 152 or deactivate the HVAC system 110 to stop pumping air out of the cabin 152 respectively.

The HVAC control module 230 controls the HVAC system 110. The cabin pressure-relief system 146 is shown as including the HVAC control module 230. The HVAC control module 230 may be located in the HVAC system 110 and the processor 138 may transmit data to and receive data from the HVAC control module 230 through a data bus or another communication path. Alternatively, the cabin pressure-relief system 146 may include an HVAC control module 230, separate from but communicatively coupled to the HVAC control module 230 in the HVAC system 110. The HVAC control module 230 may activate and deactivate the HVAC system 110 based on receiving the activation and/or the deactivation signal from the air pressure control module 220, respectively. The HVAC control module 230 may adjust the HVAC system rate of pumping air in or out of the cabin 152 based on settings received from the air pressure control module 220.

Referring now to FIG. 3, an example of a process of reducing air pressure when at least one door 148 is closing is shown. Various possible steps of process 300 will now be described. The process 300 illustrated in FIG. 3 may be applicable to the embodiments described above in relation to FIG. 1, but it is understood that the process 300 can be carried out with other suitable systems and arrangements. Moreover, the process 300 may include other steps that are not shown here, and in fact, the process 300 is not limited to including every step shown in FIG. 3. The steps that are illustrated here as part of the process 300 are not limited to this particular chronological order. Indeed, some of the steps may be performed in a different order than what is shown and/or at least some of the steps shown can occur simultaneously. Process 300 will be discussed from the perspective of the cabin pressure-relief system 146 of FIGS. 1 and 2.

At block 310, the air pressure control module 220 determines a position of at least one vehicle door 148. To determine the position of the door 148, the air pressure control module 220 may receive sensor data 142 from the sensors 120, identifying the position of the door 148 as an open position or a closed position. As an example, the sensor may be a door position sensor 132 that detects the position of the door 148, based on one or more touch-sensitive buttons along a hinge 156, as described above. As another example, the sensor may be a camera 130 that acquires images and/or video of an environment proximate to the door 148. The air pressure control module 220 may compare the images 142 received from the camera 130 to images stored in memory 210, to determine whether the door 148 is in the open position or the closed position. As another example, the sensor may be a pressure sensor 128 monitoring an internal air pressure of the cabin 152. In such an example, when the door 148 is opened, the internal air pressure sensor 126 may detect a change in the internal air pressure of the cabin 152 and upon receiving sensor data 142 that the internal air pressure has changed, the air pressure control module 220 may deduce that the door 148 is in the open position. As another example, the air pressure control module 220 may receive a close door request from a door control system, and the air pressure control module 220 may deduce that the door 148 is in the open position.

At decision block 320, the air pressure control module 220 determines whether the door is in the open position. If the door 148 is in the open position, the process 300 proceeds to decision block 330. Otherwise, the process 300 returns to block 310.

At decision block 330, the air pressure control module 220 determines whether to activate the HVAC system 110 to reduce air pressure in a cabin of the vehicle. The air pressure control module 220 may determine whether to activate the HVAC system 110 based on various conditions including what sub-position of the open position the door 148 is in, whether the cabin 152 is fluidly connected to an external environment 154 through a second opening, and/or whether the HVAC system 110 is currently on and blowing (or circulating) cool/warm air in the cabin 152.

As an option and as mentioned above, the air pressure control module 220 may determine whether to activate the HVAC system 110 based on the sub-position of the open position the door 148 is in. The door 148 may be in one of the following sub-positions—an “open and opening” position, an “open and stationary”, and an “open but closing” position. When the door 148 is in the “open and opening” position, the door 148 is spaced and moving away from a door opening 150, which receives the door 148. When the door 148 is in the “open and stationary” position, the door 148 is spaced from the door opening 150 and not moving. When the door 148 is in the “open but closing” position, the door 148 is spaced from the door opening 150 but moving toward the door opening 150.

In the case where the door 148 is in the “open and opening” position, the air pressure control module 220 determines not to activate the HVAC system 110 and the process 300 returns to block 310. However, in the case where the door 148 is in the “open and stationary” position or the “open but closing” position, the air pressure control module 220 may further consider various factors to determine whether to activate the HVAC system 110 to assist in closing the door 148. An example factor may be that the air pressure control module 220 may receive sensor data 142 indicating the door 148 in the open position and an increase in an air pressure level in the cabin. Another example factor may include user or manufacturer settings instructing the air pressure control module 220 to activate or not to activate the HVAC system 110 when the door 148 is open and stationary. Another example factor may be a distance between the open door 148 and the door opening 150. In a case whether the door 148 is wide open, e.g., two feet away from the door opening 150, the air pressure control module 220 may not activate the HVAC system 110. In a case whether the door 148 is slightly open, e.g., three inches away from the door opening 150, the air pressure control module 220 may determine to activate the HVAC system 110. Further, in the case where the door 148 is open and moving toward the door opening 150, the air pressure control module 220 may determine to activate the HVAC system 110.

As another option, the air pressure control module 220 may determine whether to activate the HVAC system 110 based on whether the cabin 152 is fluidly connected to an external environment 154 through a second opening (i.e., an opening other than the door opening 150 that receives the door 148). The air pressure control module 220 may determine that at least one of any other doors, windows, sunroofs and/or moonroofs is open, based on sensor data 142 and sensors 120 as described above.

Having a second opening may reduce an impact of the HVAC system 110 pumping air out of the cabin 152. In one embodiment, the air pressure control module 220 may determine whether the second opening is a second door opening 150 b that receives a second door 148 b and whether the second door 148 b is closing at generally a same time as the door 148 is closing. In such an example where the second door 148 b is in the open but closing position, the air pressure control module 220 may determine to activate the HVAC system 110. In another example where the opening is relatively small such as not to significantly reduce the impact of the HVAC system 110 pumping air out of the cabin 152, the air pressure control module 220 may also determine to activate the HVAC system 110.

As another option, the air pressure control module 220 may determine whether to activate the HVAC system 110 based on whether the HVAC system 110 is currently on and blowing (or circulating) cool/warm air in the cabin 152. As an example, to determine whether the HVAC system 110 is currently on, the air pressure control module 220 may request and receive a status of the HVAC system 110 from the HVAC control module 230. In a case where the HVAC system 110 is on, the air pressure control module 220 may consider various factors to determine whether to activate the HVAC system 110 to reduce air pressure in the cabin 152. As a first example, a factor may be whether the air pressure control module 220 includes a predetermined setting that instructs the air pressure control module 220 not to activate the HVAC system 110 to reduce air pressure when the HVAC system 110 is currently blowing and/or circulating air in the cabin 152. As a second example, a factor may be whether the predicted force from the HVAC system 110 for closing the door 148 (based on the user's size) exceeds a predetermined threshold. In such an example, if the predicted force is below the predetermined threshold, the air pressure control module 220 may not activate the HVAC system 110 to reduce the air pressure in the cabin 152. Alternatively, if the predicted force exceeds the predetermined threshold (e.g. a child requiring assistance in closing the door 148), the air pressure control module 220 may activate the HVAC system 110 to reduce air pressure in the cabin 152. Other example factors the air pressure control module 220 may consider are a response time for the HVAC system 110 (i.e., how much time does the HVAC system 110 require to switch from blowing air into the cabin 152 to pumping air out of the cabin 152), a rate at which air is currently blowing into the cabin 152, and/or a rate at which air would be sucked out of the cabin 152 when the HVAC system 110 is pumping air out of the cabin 152. The aforementioned factors are examples and do not limit the factors the air pressure control module 220 may consider to determine whether to activate the HVAC system 110 to reduce the air pressure in the cabin 152.

At block 340, the air pressure control module 220 determines an HVAC system rate of pumping air out of the cabin 152. The air pressure control module 220 may determine the HVAC system rate based on various conditions including a size of a user closing the door 148, a location of the door 148 and a blower of the HVAC system 110, at least one of a weight of the door 148 and a closing mechanism. Based on the condition, the air pressure control module 220 can predict or estimate the force required to close the door 148 and determine the HVAC system rate. The HVAC system rate of pumping air out of the cabin 152 includes a period between each pump of air out of the cabin 152 and a volume of air being pumped out in each pump.

As an option and as mentioned above, the air pressure control module 220 may determine the HVAC system rate based on identifying and determining a size of a user proximate to the door 148. In one case, the air pressure control module 220 may identify a user, outside the vehicle 100, approaching and/or touching the door 148, based on video 142 from a camera 130. The air pressure control module 220 may compare the image 142 of the user to stored data in memory 210 to predict a height and/or a weight for the user. In another case, the air pressure control module 220 may identify the user, inside the vehicle 100, opening the door 148 and alighting from a seat (not shown) of the vehicle 100. The air pressure control module 220 may receive a weight for the user from a weight sensor (not shown) located in the seat. Based on the weight and/or the height of the user, the air pressure control module 220 may predict the amount of force the user is capable of applying to close the door 148. The air pressure control module 220 may determine the HVAC system rate of pumping air out required to close the door 148 based on a difference between an estimated force required to close the door 148 and the predicted amount of force the user is capable of applying to close the door 148.

As another option, the air pressure control module 220 may determine the HVAC system rate of pumping air out required to close the door 148 based on a location of the door 148 relative to a location of a blower 116 of the HVAC system 110. The HVAC system rate of pumping air out may be lower for a door 148 located closer to the blower 116 than for a door 148 located farther from the blower 116.

As another option, the air pressure control module 220 may determine the HVAC system rate of pumping air out required to close the door 148 based on at least one of a weight of the door 148 and an opening/closing mechanism for the door 148. In other words, the air pressure control module 220 may estimate a force for closing a door of a certain weight and employing a certain opening/closing mechanism. In the case where the door 148 is heavier and the opening/closing mechanism is weaker, the air pressure control module 220 may estimate more force to close the door 148, and may determine the HVAC system rate be set to a higher value. In the case where the door 148 is lighter and the opening/closing mechanism is stronger, the air pressure control module 220 may estimate less force to close the door 148 and may determine the HVAC system rate be set to a lower value.

The air pressure control module 220 may determine the HVAC system rate of pumping air out based on the determined force. As an example, the HVAC system rate of pumping air out may be directly proportional to the determined force, i.e., the more force required to close the door 148, the higher the HVAC system rate of pumping air out.

At block 350, the air pressure control module 220 may transmit the determined HVAC system rate to the HVAC control module 230, based on the estimated force for closing the door 148. In response to receiving the determined HVAC system rate, the HVAC control module 230 can adjust the HVAC system 110 to the determined HVAC system rate.

At block 360, the HVAC control module 230 activates the HVAC system 110 to pump air out of the cabin 152. As an example, in response to determining that the HVAC system 110 should be activated to reduce air pressure in the cabin 152, the air pressure control module 220 transmits an activation signal to the HVAC control module 230, activating the HVAC system 110 to pump air out of the cabin 152. The air pressure control module 220 may further transmit to the HVAC control module 230 the rate at which to pump air out and the volume of air in each pump, based on the predicted force for closing the door 148.

At decision block 370, the air pressure control module 220 determines when to deactivate the HVAC system 110 from reducing air pressure in the cabin 152 of the vehicle 100. The air pressure control module 220 may determine when to deactivate the HVAC system 110 based on various conditions including a predetermined period of time, the position of the door 148, and/or the air pressure measured in the cabin 152.

As an option and as mentioned above, the air pressure control module 220 may determine to deactivate the HVAC system 110 based on a predetermined period of time. As an example, the period may be a predetermined value (such as 5 seconds) stored in the data store 140 (e.g., by the manufacturer or by the user) that may be retrieved by the air pressure control module 220. As another example, the period may be calculated based on the force to be applied to close the door 148 and the rate at which the air is being pumped out of the cabin 152. The air pressure control module 220 may apply the retrieved and/or calculated value to an internal timer, to count down the period. When the time period expires, the process 300 proceeds to block 380.

As another option, the air pressure control module 220 may determine to deactivate the HVAC system 110 based on the position of the door 148, e.g., when the door 148 is in the closed position. The air pressure control module 220 may receive sensor data 142 indicating that the door 148 is in the closed position and the process 300 may then proceed to block 380.

As another option, the air pressure control module 220 may determine to deactivate the HVAC system 110 based on the air pressure measured in the cabin 152, e.g., when the air pressure in the cabin 152 is below a predetermined air pressure threshold. The predetermined air pressure threshold may be set by the manufacturer. In such an example, the air pressure control module 220 may receive an internal air pressure value from the internal air pressure sensor 126 and compare the internal air pressure value to the predetermined air pressure threshold. As another example, the air pressure control module 220 may receive an internal air pressure and an external air pressure from the internal and external air pressure sensors, respectively, determine a difference between the internal and external pressures and if the difference is within a predetermined range, the process 300 may proceed to block 380.

At block 380, the air pressure control module 220 may send a deactivation signal to the HVAC control module 230 to stop the HVAC system 110 from pumping out air from the cabin 152. In response to receiving the instruction to stop, the HVAC system 110 may stop pumping out air from the cabin 152 and return to blowing (or circulating) cool/warm air in the cabin 152. Alternatively, the HVAC system 110 may be deactivated and turned off.

As an additional note, options mentioned in the process 300 above may be used individually or in combination with one another. As an example, the air pressure control module 220 may determine the HVAC system rate based on identifying and determining a size of a user and on a location of the door 148 relative to a location of a blower 116 of the HVAC system 110. As another example, the air pressure control module 220 may determine to deactivate the HVAC system 110 based on a combination of the position of the door 148 and the air pressure measured in the cabin 152.

A non-limiting example of the operation of the cabin pressure-relief system 146 and the air pressure control module 220 in accordance with the process 300 will now be described. In one or more arrangements, the door position sensor 132 may sense the position of the door 148 and provide the door position to the air pressure control module 220. In response to the door 148 being in an open position, the air pressure control module 220 may probe door position sensors for the other doors, to determine if any other doors are in the open position. In the case where no other doors are in open position, the air pressure control module 220 may receive sensor data 142 (such as images or video from a camera) about a user near the door 148. The air pressure control module 220 may compare the profile of the user in the images 142 to data in memory 210 to estimate the user's height and/or weight. The air pressure control module 220 may then predict an amount of force a user of the estimated height and/or weight may be capable of applying to close the door 148. Based on the predicted amount of force, the air pressure control module 220 may calculate an amount of force for assisting the user in closing the door 148, as well as a rate of pumping air out of the cabin 152, and a volume of air to be removed in each pump.

The air pressure control module 220 may send an activation signal to the HVAC control module 230, activating the HVAC system 110 to pump out air from the cabin 152 based on the calculated rate and volume. In one or more arrangements, the air pressure control module 220 may wait for information from the door position sensor 132 indicating that the door 148 is in the closed position. In response to receiving that the door 148 is in the closed position, the air pressure control module 220 may send a deactivation signal to the HVAC control module 230, deactivating the HVAC system 110 from pumping out air from the cabin 152.

It will be appreciated that arrangements described herein can provide numerous benefits, including one or more of the benefits mentioned herein. Arrangements described herein can assisting in closing at least one door 148 by reducing the air pressure in the cabin 152.

FIG. 1 will now be discussed in full detail as an example environment within which the system and methods disclosed herein may operate. In some instances, the vehicle 100 is configured to switch selectively between an autonomous mode, one or more semi-autonomous operational modes, and/or a manual mode. Such switching can be implemented in a suitable manner, now known or later developed. “Manual mode” means that all of or a majority of the navigation and/or maneuvering of the vehicle is performed according to inputs received from a user (e.g., human driver). In one or more arrangements, the vehicle 100 can be a conventional vehicle that is configured to operate in only a manual mode.

The vehicle 100 can include a powertrain 102 to generate power. As used herein, “powertrain” can include any component or group of components of the vehicle 100 that generates and/or transfers power used by the vehicle 100 for movement. In one or more arrangements, the powertrain 102 can include an engine and an energy source to generate power. The engine can be any suitable type of engine or motor, now known or later developed. For instance, the engine can be an internal combustion engine, an electric motor, a steam engine, and/or a Stirling engine, just to name a few possibilities. In some embodiments, the engine can include a plurality of engine types. For instance, a gas-electric hybrid vehicle can include a gasoline engine and an electric motor.

The energy source can be any suitable source of energy that can be used to at least partially power the engine. The engine can be configured to convert energy from the energy source into mechanical energy. Examples of energy sources include gasoline, diesel, propane, hydrogen, other compressed gas-based fuels, ethanol, solar panels, batteries, and/or other sources of electrical power. Alternatively or in addition, the energy source can include fuel tanks, batteries, capacitors, and/or flywheels. In some embodiments, the energy source can be used to provide energy for other systems of the vehicle 100.

The vehicle 100 can include battery 104 to store electrical energy for the vehicle 100. The battery 104 can provide electrical energy to power a variety of vehicle systems. For instance, the battery 104 can power a vehicle ignition system, lights, on-board electronics, as well as any other electronic device connected within the vehicle 100. In one or more arrangements, the battery 104 can be a lead-acid battery including six 2.1 volt cells to provide a nominally 12-volt battery system. The battery 104 can be configured for recharging by an engine of the powertrain 102. In one or more arrangements, the battery 104 can provide an energy source for the powertrain 102.

The vehicle 100 can include one or more data stores 140 for storing one or more types of data. The data store 140 can include volatile and/or non-volatile memory. Examples of suitable data stores 140 include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The data store 140 can be a component of the HVAC system 110, the sensor system 120 or the cabin pressure-relief system 146. Alternatively the data store 140 may be a standalone component that can be operatively connected to the HVAC system 110, the sensor system 120 and/or the cabin pressure-relief system 146 for use thereby. The term “operatively connected,” as used throughout this description, can include direct or indirect connections, including connections without direct physical contact. In one or more arrangements, the data store(s) 140 can include sensor data 142. Further, the data store(s) 140 may include instructions to allow the HVAC control module 230 to operate one or more elements of the HVAC system 110.

The vehicle 100 can include one or more user interface(s) 144. In one or more arrangements, the user interface(s) 144 can include an input system and/or an output system. An “input system” includes any device, component, system, element or arrangement or groups thereof that enable information/data to be entered into a machine. The input system can receive an input from a user (e.g. a driver or a passenger). Any suitable input system can be used, including, for example, a keypad, display, touch screen, multi-touch screen, button, joystick, mouse, trackball, microphone and/or combinations thereof. An “output system” includes any device, component, system, element or arrangement or groups thereof that enable information/data to be presented to a user. The output system can present information/data to a user. The output system can include a display. Alternatively or in addition, the output system may include a microphone, earphone and/or speaker. Some components of the vehicle 100 may serve as both a component of the input system and a component of the output system. In one or more arrangements, the user interface(s) 144 can include a vehicle head unit.

The vehicle 100 can include one or more actuators 134. The actuators 134 can be any element or combination of elements operable to modify, adjust and/or alter one or more components of the HVAC system 110 and/or the vehicle 100 responsive to receiving signals or other inputs from components such as the air pressure control module 220 and/or the HVAC control module 230. Any suitable actuator 134 can be used. For instance, the one or more actuators 134 can include motors, pneumatic actuators, hydraulic pistons, relays, solenoids, and/or piezoelectric actuators, just to name a few possibilities.

Detailed embodiments are disclosed herein. However, it is to be understood that the disclosed embodiments are intended only as examples. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the aspects herein in virtually any appropriately detailed structure. Further, the terms and phrases used herein are not intended to be limiting but rather to provide an understandable description of possible implementations. Various embodiments are shown in FIGS. 1-3, but the embodiments are not limited to the illustrated structure or application.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments. In this regard, each block in the flowcharts or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

The systems, components and/or processes described above can be realized in hardware or a combination of hardware and software and can be realized in a centralized fashion in one processing system or in a distributed fashion where different elements are spread across several interconnected processing systems. Any kind of processing system or another apparatus adapted for carrying out the methods described herein is suited. A typical combination of hardware and software can be a processing system with computer-usable program code that, when being loaded and executed, controls the processing system such that it carries out the methods described herein. The systems, components and/or processes also can be embedded in a computer-readable storage, such as a computer program product or other data programs storage device, readable by a machine, tangibly embodying a program of instructions executable by the machine to perform methods and processes described herein. These elements also can be embedded in an application product which comprises all the features enabling the implementation of the methods described herein and, which when loaded in a processing system, is able to carry out these methods.

Furthermore, arrangements described herein may take the form of a computer program product embodied in one or more computer-readable media having computer-readable program code embodied, e.g., stored, thereon. Any combination of one or more computer-readable media may be utilized. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The phrase “computer-readable storage medium” means a non-transitory storage medium. A computer-readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: a portable computer diskette, a hard disk drive (HDD), a solid-state drive (SSD), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

Generally, modules as used herein include routines, programs, objects, components, data structures, and so on that perform particular tasks or implement particular data types. In further aspects, a memory generally stores the noted modules. The memory associated with a module may be a buffer or cache embedded within a processor, a RAM, a ROM, a flash memory, or another suitable electronic storage medium. In still further aspects, a module, as envisioned by the present disclosure, is implemented as an application-specific integrated circuit (ASIC), a hardware component of a system on a chip (SoC), as a programmable logic array (PLA), or as another suitable hardware component that is embedded with a defined configuration set (e.g., instructions) for performing the disclosed functions.

Program code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber, cable, RF, etc., or any suitable combination of the foregoing. Computer program code for carrying out operations for aspects of the present arrangements may be written in any combination of one or more programming languages, including an object-oriented programming language such as Java™, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).

The terms “a” and “an,” as used herein, are defined as one or more than one. The term “plurality,” as used herein, is defined as two or more than two. The term “another,” as used herein, is defined as at least a second or more. The terms “including” and/or “having,” as used herein, are defined as comprising (i.e., open language). The phrase “at least one of . . . and . . . ” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. As an example, the phrase “at least one of A, B, and C” includes A only, B only, C only, or any combination thereof (e.g., AB, AC, BC or ABC).

Aspects herein can be embodied in other forms without departing from the spirit or essential attributes thereof. Accordingly, reference should be made to the following claims, rather than to the foregoing specification, as indicating the scope hereof. 

What is claimed is:
 1. A method for assisting in closing a door of a vehicle, the method comprising: detecting a position of at least one vehicle door; when the position of the at least one vehicle door is an open position, determining whether to activate a Heating, Ventilation and Air-conditioning (HVAC) system to reduce air pressure in a cabin of the vehicle; in response to determining to activate the HVAC system, pumping air out of the cabin such that at least some of any increased air pressure caused by a vehicle door closure is removed from the cabin; and when the position of the at least one vehicle door has changed from the open position to a closed position, deactivating the HVAC system to stop pumping air out from the cabin.
 2. The method of claim 1, further comprising: determining an HVAC system rate of pumping air out of the cabin; and adjusting the HVAC system to pump air out of the cabin according to the HVAC system rate.
 3. The method of claim 2, wherein determining the HVAC system rate of pumping air out of the cabin, further comprises: determining a size of a user closing the at least one vehicle door; estimating a force required to close the at least one vehicle door based on the user's size; and wherein the HVAC system rate of pumping air out of the cabin is at least based on the estimated force.
 4. The method of claim 2, wherein determining the HVAC system rate of pumping air out of the cabin, further comprises: determining a location of the at least one vehicle door; determining a location of a blower of the HVAC system; and wherein the blower fluidly connects the HVAC system and the cabin, wherein the HVAC system rate of pumping air out of the cabin is at least based on the location of the at least one vehicle door and the location of the blower.
 5. The method of claim 2, wherein determining the HVAC system rate of pumping air out of the cabin, further comprises: identifying at least one of a weight of the vehicle door and a closing mechanism associated with the at least one vehicle door; estimating a force for closing the at least one vehicle door based on the at least one of the weight of the vehicle door and the closing mechanism; and wherein the HVAC system rate of pumping air out of the cabin is at least based on the estimated force.
 6. The method of claim 1, wherein determining whether to activate the HVAC system to reduce air pressure in the cabin of the vehicle further comprises: detecting positions of any other doors of the vehicle, the other vehicle doors being different than the at least one vehicle door; and based on the positions of the other vehicle doors, determining whether to activate the HVAC system to pump air out of the cabin.
 7. The method of claim 6, wherein the other vehicle doors include a second vehicle door, further comprising: detecting a position of the second vehicle door; when the position of the second vehicle door is the open position and the second vehicle door is stationary, determining whether to activate the HVAC system to reduce air pressure in the cabin; and when the position of the second vehicle door is the open position and the second vehicle door is moving toward the closed position, determining to activate the HVAC system to reduce air pressure in the cabin.
 8. The method of claim 1, further comprising: detecting an air pressure level in the cabin; and wherein the determination of whether to activate the HVAC system occurs when the position of the at least one vehicle door is the open position and an increase in the air pressure level is detected.
 9. The method of claim 1, further comprising: deactivating the HVAC system to stop pumping air out of the cabin after a predetermined period of time.
 10. A cabin pressure-relief system for assisting in closing a door of a vehicle, comprising: one or more sensors operable to detect a position of at least one vehicle door; a Heating, Ventilation and Air-conditioning (HVAC) system; one or more processors; a memory communicably coupled to the one or more processors and storing: an air pressure control module including instructions that when executed by the one or more processors cause the one or more processors to, when the position of the at least one vehicle door is in an open position, determine whether to activate the HVAC system to reduce air pressure in a cabin of the vehicle; wherein, in response to a determination to activate the HVAC system, the HVAC system pumps air out of the cabin such that at least some of any increased air pressure caused by a vehicle door closure is removed from the cabin; and an HVAC control module including instructions that when executed by the one or more processors cause the one or more processors to, when the position of the at least one vehicle door has changed from the open position to a closed position, deactivate the HVAC system to stop pumping air out from the cabin.
 11. The cabin pressure-relief system of claim 10, wherein the air pressure control module further includes instructions to determine an HVAC system rate of pumping air out of the cabin; and wherein the HVAC control module further includes instructions to adjust the HVAC system to pump air out of the cabin according to the HVAC system rate.
 12. The cabin pressure-relief system of claim 11, wherein the instructions to determine the HVAC system rate of pumping air out of the cabin further include instructions to: determine a size of a user closing the at least one vehicle door; estimate a force required to close the at least one vehicle door based on the user's size; and wherein the HVAC system rate of pumping air out of the cabin is at least based on the estimated force.
 13. The cabin pressure-relief system of claim 11, further comprising: a blower fluidly connected to the HVAC system and the cabin; wherein the instructions to determine the HVAC system rate of pumping air out of the cabin further include instructions to: determine a location of the at least one vehicle door; and determine a location of the blower; and wherein the HVAC system rate of pumping air out of the cabin is at least based on the location of the at least one vehicle door and the location of the blower.
 14. The cabin pressure-relief system of claim 11, wherein the instructions to determine the HVAC system rate of pumping air out of the cabin further include instructions to: identify at least one of a weight of the vehicle door and a closing mechanism associated with the at least one vehicle door; estimate a force for closing the at least one vehicle door based on at least one of the weight of the vehicle door and the closing mechanism; and wherein the HVAC system rate of pumping air out of the cabin is at least based on the estimated force.
 15. The cabin pressure-relief system of claim 10, further comprising: one or more sensors operable to detect positions of any other doors of the vehicle, the other vehicle doors being different than the at least one vehicle door; and wherein the air pressure control module further includes instructions to: based on the positions of the other vehicle doors, determine whether to activate the HVAC system to pump air out of the cabin.
 16. The cabin pressure-relief system of claim 15, wherein the other vehicle doors include a second vehicle door, further comprising one or more sensors operable to detect a position of the second vehicle door; wherein the pressure control module further includes instructions to: when the position of the second vehicle door is the open position and the second vehicle door is stationary, determining whether to activate the HVAC system to reduce air pressure in the cabin; and when the position of the second vehicle door is the open position and the second vehicle door is moving toward the closed position, determining to activate the HVAC system to reduce air pressure in the cabin.
 17. The cabin pressure-relief system of claim 10, further comprising: one or more sensors operable to detect an air pressure level in the cabin; and wherein the air pressure control module further includes instructions to determine whether to activate the HVAC system when the position of the at least one vehicle door is in the open position and an increase in the air pressure level is detected.
 18. The cabin pressure-relief system of claim 10, wherein the HVAC control module further includes instructions to: deactivate the HVAC system to stop pumping air out of the cabin after a predetermined period of time.
 19. A non-transitory computer-readable medium for assisting in closing a door of a vehicle and including instructions that when executed by one or more processors cause the one or more processors to: receive a position of at least one vehicle door; when the position of the at least one vehicle door is an open position, determine whether to activate a Heating, Ventilation and Air-conditioning (HVAC) system to reduce air pressure in a cabin of the vehicle; and when the position of the at least one vehicle door has changed from the open position to a closed position, deactivate the HVAC system to stop pumping air out from the cabin.
 20. The non-transitory computer-readable medium of claim 19, wherein the instructions further include instructions to: determine an HVAC system rate of pumping air out of the cabin; and adjust the HVAC system to pump air out of the vehicle according to the HVAC system rate. 